| 1 | M & M Petroleum Company | Mannford, OK 74044-0462 | Oil Operator | Apr 2020 |
| 2 | M & T Production Company LLC | Tulsa, OK 74132-3742 | Oil Operator | Apr 2011 |
| 3 | Mac Engineering & Operating Co | | Oil & Gas Operator | May 2005 |
| 4 | Macanudo Energy Inc | Sapulpa, OK 74066 | Gas Operator | Jan 2007 |
| 5 | Maggard Joe | Mannford, OK 74044 | Oil & Gas Operator | May 2023 |
| 6 | Maggard Supply & Oil Company | Mannford, OK 74044-1407 | Oil & Gas Operator | Nov 2014 |
| 7 | Maggard VIrginia J | Mannford, OK 74044-3027 | Oil Operator | Nov 2025 |
| 8 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 9 | Maguire James Q Inc | Norman, OK 73070-1748 | Oil & Gas Operator | Jun 2011 |
| 10 | Maintainer Energy Res Corp Inc | Morris, OK 74445-2663 | Oil Operator | Oct 2025 |
| 11 | Major Oil Co LLC | Drumright, OK 74030 | Oil & Gas Operator | May 2025 |
| 12 | Manis Oil & Gas Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2025 |
| 13 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 14 | Mariah Exploration LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Oct 2008 |
| 15 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Nov 2025 |
| 16 | Marjo Operating Mid-Continent LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 17 | Mark Holloway Inc | Oklahoma City, OK 73107-6526 | Oil & Gas Operator | Nov 2025 |
| 18 | Mark Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2018 |
| 19 | Marrs Bros Oil Co Inc | Drumright, OK 74030 | Oil Operator | Sep 1994 |
| 20 | Martin Billy G | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 21 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 22 | Mason, Tommy L | | Oil & Gas Operator | May 2013 |
| 23 | Matherly Elaine | Bristow, OK 74010-9536 | Oil Operator | Mar 2015 |
| 24 | Mathews Roger Dba Mathews Oil/Trans Energy | Kellyville, OK 74039 | Oil Operator | Oct 2025 |
| 25 | Mattea Oil & Gas LLC | Drumright, OK 74023 | Oil & Gas Operator | Jun 2025 |
| 26 | Matthews Florine D | Bristow, OK 74010 | Oil & Gas Operator | Jan 2020 |
| 27 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Feb 2026 |
| 28 | Maxwell Resources Corporation | Oklahoma City, OK 73159 | Oil & Gas Operator | Apr 2009 |
| 29 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Oct 2025 |
| 30 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Feb 2026 |
| 31 | Mayo Ross L Inc | Oklahoma City, OK 73120-1426 | Oil & Gas Operator | Jan 1997 |
| 32 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Nov 2025 |
| 33 | McFerran Operating LLC | Seminole, OK 74868-6202 | Oil & Gas Operator | Dec 2025 |
| 34 | McGinley Jr, John R | | Gas Operator | Nov 1998 |
| 35 | McGinley P A | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1996 |
| 36 | McGonigal Ted W | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 37 | McGuire Tom Oil Company | Depew, OK 74028 | Oil Operator | Apr 2011 |
| 38 | McNic Oil & Gas Midcontinent | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | May 2024 |
| 39 | McNutt P L | San Marcos, CA 92069-4817 | Oil & Gas Operator | Jul 1994 |
| 40 | McOil Operating Company LLC | Muskogee, OK 74401 | Oil & Gas Operator | Nov 2025 |
| 41 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Dec 2025 |
| 42 | Medallion Energy Inc | Norman, OK 73072-7436 | Oil & Gas Operator | Aug 2004 |
| 43 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 44 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Dec 2025 |
| 45 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 46 | Mickalson Operating Company | Cleveland, OK 74020 | Oil & Gas Operator | Dec 2025 |
| 47 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 48 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 49 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 50 | Mid-Continent Petroleum Management Inc | Cement, OK 73017 | Oil & Gas Operator | Nov 2025 |
| 51 | Midnight Energy Operating LLC | Drumright, OK 74030 | Oil Operator | Nov 2025 |
| 52 | Midwest Eor Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | May 2013 |
| 53 | Mikal R Brown Oil LLC | Cleveland, OK 74020-6475 | Oil Operator | Dec 2022 |
| 54 | Mikarden Energy Inc | Sapulpa, OK 74066 | Oil Operator | Oct 2025 |
| 55 | Miller B Investments | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2007 |
| 56 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 57 | Miller John Production | Bristow, OK 74010-2455 | Oil & Gas Operator | Jul 2016 |
| 58 | Miller William D | Sapulpa, OK 74066-1061 | Oil Operator | Oct 2010 |
| 59 | Miller-McGee Operating Inc | Stroud, OK 74079 | Oil & Gas Operator | Dec 2025 |
| 60 | Miner Rick Oil Inc | Drumright, OK 74030-0373 | Oil & Gas Operator | Apr 2022 |
| 61 | Mission Leasing LTD | Tulsa, OK 74136 | Oil Operator | Dec 2000 |
| 62 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Feb 2026 |
| 63 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 64 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 65 | Montex Exploration Company | Houston, TX 77057 | Oil & Gas Operator | Mar 2011 |
| 66 | Montgomery Oil & Gas Expl Inc | Tulsa, OK 74170-1884 | Oil & Gas Operator | Mar 2005 |
| 67 | Monty L Hott Production Corporation | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2025 |
| 68 | Moore W T | Sapulpa, OK 74067-0946 | Oil & Gas Operator | Jan 2021 |
| 69 | Moran-K Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Dec 2025 |
| 70 | Moran-Kahn Oil | Seminole, OK 74868 | Oil & Gas Operator | Mar 1992 |
| 71 | Morton Bros A Partnership | Bristow, OK 74010-0403 | Oil & Gas Operator | Jul 2003 |
| 72 | Morton Brothers Company | Bristow, OK 74010 | Oil & Gas Operator | May 2009 |
| 73 | Morton Drilling Company | Bristow, OK 74010-1279 | Oil & Gas Operator | Jun 1995 |
| 74 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 75 | Morton Production Inc | Ada, OK 74820-2643 | Oil & Gas Operator | Sep 2014 |
| 76 | Mountain Creek Energy Inc | Georgetown, TX 78633 | Oil & Gas Operator | Nov 2025 |
| 77 | Mozark Corporation | Spring, TX 77379-8049 | Oil & Gas Operator | Jan 2011 |
| 78 | MRD Nowata LLC | Woodstock, GA 30189 | Oil Operator | Aug 2017 |
| 79 | Mueggenborg Derrick R Dba DRM Oil & Gas | Yale, OK 74085 | Oil Operator | Oct 2025 |
| 80 | Musgrove Casey Oil | Ponca City, OK 74602-0391 | Oil & Gas Operator | Jun 2017 |